00270nam a2200109Ia 4500008004100000041000800041082001400049100001700063245006000080250001200140260000800152211209s9999    xx            000 0 und d  aeng  a004.6.BLA  aUYLESS BLACK  aCOMPUTER NETWORKS, PROTOCOLS, STANDARDS AND INTE RACES   a2ND ed.  bPHI